Supervisor teaches you how to judge home decoration materials
With the advancement of materials and technology, in a short period of time, there have also been a lot of changes in the decoration: some of the materials have been eliminated and some of the products have been upgraded... but we have often seen in some construction sites, some small decoration companies or renovated guerrillas. Still using some of the materials or processes that have been eliminated. The home improvement supervisor comes to analyze and identify you in detail. Carpentry Bag standpipe: Pine>> Light steel keel>> Brickwork Eliminated Products and Reasons: Pine - In the previous years, the material used in the bathroom uprights was pine wood. However, because the pine wood was easily deformed and prone to thermal expansion and contraction, it often caused cracks in the corners, causing the tiles to loosen. And pine wood is rotable and has a short life. Alternatives: Light steel keel replaces pine wood with its strong stability, fire-retardant and anti-corrosion properties. However, it also has disadvantages: under normal circumstances, a layer of stencil is hung on the cement pressure plate and then plastered. Because the degree of adhesion between the plaster layer and the pressure plate is not high, the ceramic tile is easily shed. Upgrades: Traditional brickwork. The use of traditional light brick, red brick and other walls, then plaster tiles. This method makes the performance after the tiling the most stable, but the area occupied is relatively large, so in some smaller bathroom, will still use light steel keel riser. Wooden keel>>Light steel keel Eliminated products and reasons: In the process of home renovation, wood keel is widely used in some concealed projects such as the top ceiling and flue, but due to the characteristics of wood, it is prone to shrinkage, unstable performance, easily lead to the top of the ceiling cracking , And cracks easily appear in the keel and gypsum board joints. Alternatives: Due to these characteristics of wood keel, there is no expansion coefficient, basically no cracking deformation, and the stable light steel keel quickly replaced it. At present, in the flue and ceiling, light steel keels are generally used except for some special shapes that cannot be made by light steel keels. bricklayer Cement mortar >> >> Matching mortar Common supplies: As a tiled material, the cement mortar is still the most widely used, and the corresponding process is a traditional cement mortar paving. The quality of materials such as cement quality, sand thickness, and mud content are difficult to control. According to reports, in the process of proportioning of cement mortar, whether the ratio is reasonable, whether the amount of material is in place, and whether the mixing is uniform will affect the quality of the cement mortar, resulting in the quality problems of plastering and tiling. During the operation, the worker's skill is higher, but the cost is lower. Upgrades: Matching mortar, also known as tile adhesives, corresponds to a thin paste method that can be used directly on water. Quality standards are easy to control and have high bond strength. The workers are easy to operate and the brick laying efficiency is greatly improved. However, the thin-paste method needs to perform leveling treatment on the wall first, and has more procedures than cement mortar paving. This part requires higher labor costs; in addition, the cost of tile adhesive is much higher than that of ordinary cement mortar. Because of the relatively high cost, cement mortar is still the most common way of laying. Oil workers 107ã€108 Adhesive >> >> Interface agent Elimination products and reasons: As a medium between the plastering layer and the putty layer, it is used to improve the adhesion of the plastering layer. Previously, 107 or 108 glues have been used. However, these two products have been eliminated because of poor environmental performance. Substitutes: Nowadays, a product called interface agent has been specially introduced. Although it also contains glue, the composition of the glue is relatively environmentally friendly, and its firmness is stronger than that of 107 and 108, and it is also more resistant to alkali. 821 putty >> >> Water-resistant putty Elimination products and reasons: 821 putty, although the price is relatively low, but almost no water resistance, brushing paint often appear after shedding, wrinkling, peeling and other engineering quality problems, the service life is low. In addition, non-water-resistant putty 821 and other poor adhesion. Alternatives: Water-resistant putty. The new water-resistant putty has a higher degree of adhesion and is more resistant to alkali and water. Primerless >> >> Primer Coatings have gone through the process from primerless to primed and topcoats. Before three years ago, many people did not use primers for decoration, and applied paint directly after scratching the putty. Nowadays, primers are used in the painting process, and the primers are usually brushed once and twice. The primer can better prevent alkali from moisture and prevent wall paint from becoming powdery. plumber Galvanized pipe>>PVC pipe>>Hot-plated pipe Elimination products and reasons: The initial circuit used was galvanized pipe. PVC pipe was used later. However, because PVC pipe is brittle, it cannot be drawn once it is damaged, and if the line is damaged during construction, it cannot be detected. Alternatives: Currently used are hot-plated tubes, which prevent rust and do not fall off easily. And the hardness of the pipe is high enough to protect the circuit from damage. Galvanized pipe>>Aluminum plastic pipe>>PPR pipe Outgoing items and reasons: In the past during the waterway reconstruction process, galvanized pipes were generally used. This kind of pipe is thick, easy to rust, and easy to be corroded. Once it is eroded, the water pipe becomes thinner, the water output becomes smaller, and the water also turns yellow. Later, people gradually adopted aluminum plastic pipe. However, due to the use of joint-insertion type aluminum plastic pipe, and there is a certain degree of looseness, once buried in the wall, resulting in no scalability, it is easy to fall off and lead to running accidents. In addition, due to the use of hot melt, the quality of the pipe material more impurities, easily lead to weak welding, water leakage also occurs. Alternatives: PPR tubes are currently used. This kind of pipe adopts the method of hot-melting. The whole water pipe has only the outlet of the water outlet, and the expansion and expansion coefficient are small, and it is not easy to be deformed. It is suitable for concealed projects. 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